參數(shù)資料
型號(hào)： L6714
廠商： 意法半導(dǎo)體
英文描述： 4 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6Bit CPUs
中文描述： 4英特爾VR10，VR11和AMD的6位嵌入式CPU的司機(jī)相控制器
文件頁數(shù)： 43/70頁
文件大?。?/td> 572K
代理商： L6714
L6714
Soft start
43/70
15.1
Intel mode
Once L6714 receives all the correct supplies and enables, and Intel Mode has been
selected, it initiates the Soft-Start phase with a T
1
= 1ms
(min)
delay. After that, the reference
ramps up to V
BOOT
= 1.081V (1.100V - 19mV) in T
2
according to the SSOSC settings and
waits for T
3
= 75
μ
sec
(typ)
during which the device reads the VID lines. Output voltage will
then ramps up to the programmed value in T
4
with the same slope as before (
See
Figure 14
).
SSOSC defines the frequency of an internal additional Soft-Start-oscillator used to step the
reference from zero up to the programmed value; this oscillator is independent from the
main oscillator whose frequency is programmed through the OSC pin. SSOSC sets then the
Output Voltage dV/dt during Soft-Start according to the resistor R
SSOSC
connected vs.
SGND. In particular, it allows to precisely programming the start-up time up to V
BOOT
(T
2
)
since it is a fixed voltage independent by the programmed VID. Total Soft-Start time
dependence on the programmed VID results (
See Figure 15
):
where T
SS
is the time spent to reach the programmed voltage V
SS
and R
SSOSC
the resistor
connected between SSOSC and SGND in k
.
Protections are active during Soft-Start, UVP is enabled after the reference reaches 0.6V
while OVP is always active with a fixed 1.24V threshold before V
BOOT
and with the threshold
coming from the VID (or the programmed V
OVP
) after V
BOOT
(See red-dashed line in
Figure 14
).
Note:
If during T
3
the programmed VID selects an output voltage lower than V
BOOT
, the output
voltage will ramp to the programmed voltage starting from V
BOOT
.
R
SSOSC
k
[
]
T
2
μ
s
[
]
4.9783
10
2
–
=
T
SS
μ
s
[
]
1075
μ
s
[
]
R
k
5.3816
R
k
5.3816
[
]
2
–
10
-------------------------------------
V
SS
if V
SS
V
BOOT
>
)
]
2
–
10
-------------------------------------
V
BOOT
V
BOOT
V
SS
–
(
)
+
[
]
if V
SS
V
BOOT
<
)
+
=
相關(guān)PDF資料
PDF描述
L6714TR 4 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6Bit CPUs
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